TIRE SENSOR MODULE AND TIRE SENSOR

To provide a composite piezoelectric element configured to measure deformation generated in a specific direction with high sensitivity and accuracy and a tire-condition measuring apparatus including the composite piezoelectric element, a composite piezoelectric element 10 includes a first electrode layer 12, a piezoelectric substance layer 13 disposed on the first electrode layer 12, and a second electrode layer 14 disposed on the piezoelectric substance layer 13, wherein, in plan view, a measuring unit 15 including the first electrode layer 12, the piezoelectric substance layer 13, and the second electrode layer 14 and a buffer portion 16 in which the piezoelectric substance layer 13 is not provided are provided.